Vacuum carburetor



E. L. MEISINGER VACUUM GARBURETOR Filed Juhe 28. 1922 s Sheets-Sheet 1 $14M lTL/llealukzyer 7w, wm a Oct. 30,1923. 1,472,660

F. L. MEISINGER VACUUM CARBURE'I'OR Filed June 28 1.922 s Sheets-Sheet 2 w 1 I: I \1 I N 3mm ZL/Iiezlnkyer reasse- UNITED STATES PA ENT- car es.

nnvv inn LAWRENCE iunisnvenn, or onanron, rnnnsvnvanrn.

VACUUM CARBUBETOR.

Application filed June 28,- 1922. Serial No..5 71,335.

Tot-all whom it may concern;

. Be it known that I, EDWARD L. MEISINGER, citizen of the United States of America, residing at Clarion, in the'State of Pennsylvania,have invented certain new and useful Improvements in Vacuum Carburetors, of w-l'iich the following is a specification.

The invention relates to improvements in a. vacuum carburetor.

It is an objectof the present invention to provide a combined vacuum tank and a carburetor in a unitary structure, thereby eliminating. the use of independent vacuum. tanks,

such as are now extensively employed. This carburetor positively will not flood- With the foregoing conception in mind the invention preferably consists of a vacuum carburetor having a gasoline receiving tank to which fuel is introduced by suction created by the. engine, incombination with an adjacent accumulating chamber receiving: a supply of fuel to be constantly fed to the engine through any approved form of jets. More specifically, my in.

vention relates to an improved means for controlling the introduction of fuel from the main supply-tank to the vacuum tank of the carburetor, such means being automatic in operation and: serving to always maintain a proper level of the gasoline in the vacuum tank.

In'the accompanying drawings I have shown the preferred embodiment of my invention, but it will be readily understood without departing from. the spirit thereof. in the drawings-Figure 1 is. anelevation partly broken away.

Figure 2 is a top plan view of the carburetor, and,

Figures 3, 4; and-5 are detail views of the float control for the'vacuum tank.

Referring now more particularly to the drawings: wherein like reference characters indicate corresponding parts, the numeral 1 designates the unitary structure comprising the vacuum chamber 2, the feed chamber3 and the usual vaporizing or carburetting chamber l: for the air and gasoline. It will be understood that'the three elements above specified-are formed-as a unit, sothat a se a-' ration of the vacuum chamber from the float chamber with. the usual connecting pipe is not needed; I will now describe the varione structural features of the carburetor.

' that the same is susceptible of many changes.

The vacuum chamber 2 of. the carburetor is provided witlrtlie usual pipe inlet 4 leading from the main gasolme tank usually posltioned in the rear ofthe motor vehicle and is also connected with a suction pipe 5 leading: to the manifold 6 of the engine whereby the suction strokes of the piston Wlll create a vacuum. in the interior of the tank 1 causing gasoline to be drawn through the pipe l into this tank. Asiswell understood in regard to vacuum tanks, a valve when the trip valve is open. The trip arm 9 1s preferably actuated by atrip dog 11' connected with the float arm 12 carrying the float 13 which rises and falls with the level of the fuel in the tank 1. The trip valve 8 is supported upon a bifurcated end 13. connected with links 14k suspended from the supporting members 15 on the under side of the tank, said linksbeing normally main.- tained in a position to hold the valve closed by the action of the springs 17 connecting the opposed links- 14. When, however, the float 13 drQPs the links 14' are moved out wardly againstthe tension of the springs 17 and cause the trip valveS to lower where.

by the suction is created in the tank 1 and gasoline drawn thereto through thepipe 4.

As thelevel of the gasoline raises the float rises and the springs 17 force the valve in aclosed' position, the valve again opening when the liquid level in thetank drops.

Leading from the vacuum tank 2 is a fuel feed pipe 18, the same having a check valve 19 therein. Thischeck valve remains closed while suction is maintained in the tank 1 and opens automatically when the suction is stopped, due to the-rise ofthe valve 8 and thereby allows gasoline to fiow into the feed chamber or tank 3 which is maintained at a level substantially the same as the level of the gasoline in the vacuum chamber 1. This chamber 2 is formed with a vent opening 20, a screen 21, and a drain plug 22. it is secured to the mixing tube or pipe 3, having saddles 24 fitting therethrough, the suc' tion tank 1 likewise being formed with saddles, which two tanks are united by bolts or any other fastening devices.

From the tank 2 gasoline feed jets or lines 25 extend upwardly into the carburetting or mixing chamber, one constituting a low speed jet and the other a high speed jet. The structure of these feeding tubes is common in carburetors and need not be definitely described herein. Suitable valves 26, however, areprovided for controlling the supply of fuel through said feeding tubes.

The carburetting chamber forming a part of this invention is preferably a round iron tube or the likehaving a substantially coneshaped member27 inserted therein to provide a jacket 28, adapted to receive heating gases from the engine to assist in vaporizing the fuel. Said carburetting chamber is also formed with an air control valve 28 con-- nected with a stem 29 passing through a bracket 30 and normally urged closedvby a spring 81. The usual butterfly throttle valve 22 is disposed within the mixing chamber controlled by any suitable throttle. As the engine operates the air valve 28 is raised, al-

lowing the air to pass into the space between said valve and the throttle valve 32, which air completely mixes and vaporizes the incoming gasoline admitted through the feed pipes 25. By adjusting the nut 83 the ten- 7 sion of the spring 31 is of course controlled and this will vary the the valve 28. 7

From the foregoing it is believed that the operation of the deviceand its advantages extent of opening of will be clearly appreciated, but these may be briefly repeated as follows: The vacuum chamber and the gasoline supply chamber for the feeding jets are built in a unitary structure sons to occupy little space under the engine hood and to dispense with long gasoline lines, such as are frequently used.

The vacuum chamber is in direct comr'nuni cation with the engine through the suction pipe 5, serving to create a suction through said chamber serving to draw definite quantities of gasoline therein through the pipe 1. The gasoline level is maintained in the vacuum chamber by the action of the float the tank 2 the level of which equals the level of the fuel in the tank 1. V The tank 2 is in constant communication with the tank 3, the suction of the engine drawing the fuel from this tankthrough the feed jets 25 where it contacts with air while in a liquid or vapor condition admitted to the mixing chamber and passing through the restricted opening formed bythe inserted collar 27. This collar of course is shaped so as to present a venturi to accelerate the passage of the gases and the valve 28 serves to materially control the quantity of air mixed with the gasoline.- It will be appreciated that the invention is susceptible of 'many changes without departing from the spirit of the claims, and I wish it to be understood that the mixing chamber may be materially altered in form and that various means may be employed for creating the suction created .in the vacuum chamber 1, and I am not limited to the means herein disclosed.

Having thus described my invention, what I claim is: 7

1. A carburetor having a verticalcarburetting chamber'open at its lower end, and an air inlet leading to said carburetting chamber with a valve for controlling the same, a vacuum supply chamber at one side of said carburetting chamber, a saddle for securing said chamber to the carburetting chamber, a suction pipe leading from the engine manifold above the throttle valve to said vacuum chamber, a float controlled valve for said suction pipe tomamtam the level of fuel in said chamber constant, an in-' dependent. gasoline feeding chamber disposed on the opposite side of said carburetting chamber and spaced therefrom throughout its length, an independent transverse pipe extending transversely of said carbu- 'rettmg chamber and spanning the gap between said vacuum chamber and said fuel feeding chamber for establishing commun1- cation between said chambers at the lower ends thereof, a check valve carried by said pipe and disposed within the fuel feeding chamber, and a fuel feeding supply pipe leading from the lower end of said fuel feeding chamber into said carburettlng chamber for supplying fuel thereto.

2. In a vacuum fuel feeding apparatus,

the combination with a vacuum chamber, a fuel inlet to said vacuum chamber, a sue tion pipe leading from an engine manifold to said vacuum chamber, a reciprocating valve for controlling said'pipe, a pair of pivoted links suspended from the closure of said vacuum chamber, transverse arms pivotally connected to said links, a valve operating member having a lower bifurcated portion to which said arms are pivotally connected, resilient means connecting said pivoted links for normally maintaining said valve closed by urging said bifurcated member upwardly and tripping mechanism for operated by said trip arm and adapted to opening said valve including a float, asupbe closed When said suction pipe valve is port therefor, a trip arm actuated upon the open, and means for feeding fuel from the lowering of said float to separate said links vacuum chamber to a carburetor.

5 against the tension of said spring by the In testimony whereof I afiix my signature.

Weight of said float and to cause said Valve a to lower, in combination with a. vent valve EDWARD LAWRENCE MEISINGER- 

